"relsize", "\suppressBibHeader"

ptbposter/ptbposter.cls

@@ -330,6 +330,8 @@
   \PTBlandscapetrue
 \fi
 
+\RequirePackage{relsize}\renewcommand\RSpercentTolerance{0}
+
 \newcommand*\scaleFontSizes[1]{%
   \global\PTB@default@fsize=#1\PTB@default@fontsize@base
 }
@@ -489,6 +491,10 @@
 ]{subparagraph}
 }
 
+\newcommand*\suppressBibHeader{% no head line for bibliography (\refname)  
+  \let\bib@heading=\relax 
+}
+
 \setcounter{secnumdepth}{-2}
 \renewcommand*\maketitle[1][1]{}
 \renewcommand*\tableofcontents{}